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Simultaneous electrochemiluminescence determination of galanthamine, homolycorine, lycorenine, and tazettine in Lycoris radiata by capillary electrophoresis with ultrasonic-assisted extraction.
Journal of Chromatography. B, Analytical Technologies in the Biomedical and Life Sciences 2017 June 16
After ultrasonic-assisted extraction, four lycoris radiata alkaloids: galanthamine, homolycorine, lycorenine, and tazettine were determined by capillary electrophoresis electrochemiluminescence. Polyvinylpyrrolidone was added to the running buffer (RB) to obtain better resolution. Experimental conditions influencing the determination were examined, including the additives, detection potential, separation voltage, injection voltage and time, and RB pH and concentration. Under optimal experimental conditions, the baseline separation of the four alkaloids occurred within 16min. The proposed method displayed the following linear ranges (in ng/mL): galanthamine [60-5000], homolycorine [40-5000], lycorenine [5.0-1500], and tazettine [8.0-2500]. The detection limits in ng/mL, (S/N=3), were galanthamine [14], homolycorine [11], lycorenine [1.8], and tazettine [3.1]. Intra-day and inter-day RSDs for the four alkaloids of the six replicates were less than 2.7% and 3.1%, respectively. The recoveries in% were: tazettine [102.5], lycorenine [98.20], galanthamine [97.30], and homolycorine [98.33].
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